Asbolane

Asbolane is a manganese (IV) oxy-hydroxide mineral containing also cobalt, nickel, magnesium, and calcium ions. It crystallizes in the hexagonal crystal system. Its chemical formula is Mn^{4+}(O,OH)2*(Co,Ni,Mg,Ca)_{x}(OH)_{2x}*nH2O.

Naming
It is named after the Greek word for "soil like soot".